The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years. The study of Cytology of the Nervous system is known as Neurocytology. It primarily focusses on the Nervous System tissue, Neurons (Parenchymal Cells), and the Glia (Stromal or Supporting Cells). It helps in analysing the neuroinfections, by studying the dendrites, nucleus, organelles and the supporting cells normal and abnormal neuron functioning.